package org.smart4j.framework.util;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/*
* JSON工具类
* */
public class JsonUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(JsonUtil.class);
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    //将POJO转换为JSON
    public static <T> String toJson(T obj){
        String json;
        try {
            json = OBJECT_MAPPER.writeValueAsString(obj);
        }catch (Exception e){
            LOGGER.error("convert POJO to JSON failure");
            throw new RuntimeException(e);
        }
        return json;
    }

    //将JSON转换为POJO
    public static <T> T fromJson(String json, Class<T> type){
        T pojo;
        try {
            pojo = OBJECT_MAPPER.readValue(json, type);
        }catch (Exception e){
            LOGGER.error("convert JSON to POJO failure");
            throw new RuntimeException(e);
        }
        return pojo;
    }
}
